/
test_file_jpeg2k.py
362 lines (264 loc) · 10 KB
/
test_file_jpeg2k.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
import os
import re
from io import BytesIO
import pytest
from PIL import Image, ImageFile, Jpeg2KImagePlugin, UnidentifiedImageError, features
from .helper import (
assert_image_equal,
assert_image_similar,
assert_image_similar_tofile,
skip_unless_feature,
)
EXTRA_DIR = "Tests/images/jpeg2000"
pytestmark = skip_unless_feature("jpg_2000")
test_card = Image.open("Tests/images/test-card.png")
test_card.load()
# OpenJPEG 2.0.0 outputs this debugging message sometimes; we should
# ignore it---it doesn't represent a test failure.
# 'Not enough memory to handle tile data'
def roundtrip(im, **options):
out = BytesIO()
im.save(out, "JPEG2000", **options)
test_bytes = out.tell()
out.seek(0)
with Image.open(out) as im:
im.bytes = test_bytes # for testing only
im.load()
return im
def test_sanity():
# Internal version number
assert re.search(r"\d+\.\d+\.\d+$", features.version_codec("jpg_2000"))
with Image.open("Tests/images/test-card-lossless.jp2") as im:
px = im.load()
assert px[0, 0] == (0, 0, 0)
assert im.mode == "RGB"
assert im.size == (640, 480)
assert im.format == "JPEG2000"
assert im.get_format_mimetype() == "image/jp2"
def test_jpf():
with Image.open("Tests/images/balloon.jpf") as im:
assert im.format == "JPEG2000"
assert im.get_format_mimetype() == "image/jpx"
def test_invalid_file():
invalid_file = "Tests/images/flower.jpg"
with pytest.raises(SyntaxError):
Jpeg2KImagePlugin.Jpeg2KImageFile(invalid_file)
def test_bytesio():
with open("Tests/images/test-card-lossless.jp2", "rb") as f:
data = BytesIO(f.read())
assert_image_similar_tofile(test_card, data, 1.0e-3)
# These two test pre-written JPEG 2000 files that were not written with
# PIL (they were made using Adobe Photoshop)
def test_lossless(tmp_path):
with Image.open("Tests/images/test-card-lossless.jp2") as im:
im.load()
outfile = str(tmp_path / "temp_test-card.png")
im.save(outfile)
assert_image_similar(im, test_card, 1.0e-3)
def test_lossy_tiled():
assert_image_similar_tofile(
test_card, "Tests/images/test-card-lossy-tiled.jp2", 2.0
)
def test_lossless_rt():
im = roundtrip(test_card)
assert_image_equal(im, test_card)
def test_lossy_rt():
im = roundtrip(test_card, quality_layers=[20])
assert_image_similar(im, test_card, 2.0)
def test_tiled_rt():
im = roundtrip(test_card, tile_size=(128, 128))
assert_image_equal(im, test_card)
def test_tiled_offset_rt():
im = roundtrip(test_card, tile_size=(128, 128), tile_offset=(0, 0), offset=(32, 32))
assert_image_equal(im, test_card)
def test_tiled_offset_too_small():
with pytest.raises(ValueError):
roundtrip(test_card, tile_size=(128, 128), tile_offset=(0, 0), offset=(128, 32))
def test_irreversible_rt():
im = roundtrip(test_card, irreversible=True, quality_layers=[20])
assert_image_similar(im, test_card, 2.0)
def test_prog_qual_rt():
im = roundtrip(test_card, quality_layers=[60, 40, 20], progression="LRCP")
assert_image_similar(im, test_card, 2.0)
def test_prog_res_rt():
im = roundtrip(test_card, num_resolutions=8, progression="RLCP")
assert_image_equal(im, test_card)
def test_default_num_resolutions():
for num_resolutions in range(2, 6):
d = 1 << (num_resolutions - 1)
im = test_card.resize((d - 1, d - 1))
with pytest.raises(OSError):
roundtrip(im, num_resolutions=num_resolutions)
reloaded = roundtrip(im)
assert_image_equal(im, reloaded)
def test_reduce():
with Image.open("Tests/images/test-card-lossless.jp2") as im:
assert callable(im.reduce)
im.reduce = 2
assert im.reduce == 2
im.load()
assert im.size == (160, 120)
im.thumbnail((40, 40))
assert im.size == (40, 30)
def test_negative_height():
with Image.open("Tests/images/negative_height.j2k") as im:
assert im.size[1] == 0
def test_load_dpi():
with Image.open("Tests/images/test-card-lossless.jp2") as im:
assert im.info["dpi"] == (71.9836, 71.9836)
with Image.open("Tests/images/zero_dpi.jp2") as im:
assert "dpi" not in im.info
def test_restricted_icc_profile():
ImageFile.LOAD_TRUNCATED_IMAGES = True
try:
# JPEG2000 image with a restricted ICC profile and a known colorspace
with Image.open("Tests/images/balloon_eciRGBv2_aware.jp2") as im:
assert im.mode == "RGB"
finally:
ImageFile.LOAD_TRUNCATED_IMAGES = False
def test_header_errors():
for path in (
"Tests/images/invalid_header_length.jp2",
"Tests/images/not_enough_data.jp2",
):
with pytest.raises(UnidentifiedImageError):
with Image.open(path):
pass
with pytest.raises(OSError):
with Image.open("Tests/images/expected_to_read.jp2"):
pass
def test_layers_type(tmp_path):
outfile = str(tmp_path / "temp_layers.jp2")
for quality_layers in [[100, 50, 10], (100, 50, 10), None]:
test_card.save(outfile, quality_layers=quality_layers)
for quality_layers in ["quality_layers", ("100", "50", "10")]:
with pytest.raises(ValueError):
test_card.save(outfile, quality_layers=quality_layers)
def test_layers():
out = BytesIO()
test_card.save(out, "JPEG2000", quality_layers=[100, 50, 10], progression="LRCP")
out.seek(0)
with Image.open(out) as im:
im.layers = 1
im.load()
assert_image_similar(im, test_card, 13)
out.seek(0)
with Image.open(out) as im:
im.layers = 3
im.load()
assert_image_similar(im, test_card, 0.4)
@pytest.mark.parametrize(
"name, args, offset, data",
(
("foo.j2k", {}, 0, b"\xff\x4f"),
("foo.jp2", {}, 4, b"jP"),
(None, {"no_jp2": True}, 0, b"\xff\x4f"),
("foo.j2k", {"no_jp2": True}, 0, b"\xff\x4f"),
("foo.jp2", {"no_jp2": True}, 0, b"\xff\x4f"),
("foo.j2k", {"no_jp2": False}, 0, b"\xff\x4f"),
("foo.jp2", {"no_jp2": False}, 4, b"jP"),
("foo.jp2", {"no_jp2": False}, 4, b"jP"),
),
)
def test_no_jp2(name, args, offset, data):
out = BytesIO()
if name:
out.name = name
test_card.save(out, "JPEG2000", **args)
out.seek(offset)
assert out.read(2) == data
def test_mct():
# Three component
for val in (0, 1):
out = BytesIO()
test_card.save(out, "JPEG2000", mct=val, no_jp2=True)
assert out.getvalue()[59] == val
with Image.open(out) as im:
assert_image_similar(im, test_card, 1.0e-3)
# Single component should have MCT disabled
for val in (0, 1):
out = BytesIO()
with Image.open("Tests/images/16bit.cropped.jp2") as jp2:
jp2.save(out, "JPEG2000", mct=val, no_jp2=True)
assert out.getvalue()[53] == 0
with Image.open(out) as im:
assert_image_similar(im, jp2, 1.0e-3)
def test_rgba():
# Arrange
with Image.open("Tests/images/rgb_trns_ycbc.j2k") as j2k:
with Image.open("Tests/images/rgb_trns_ycbc.jp2") as jp2:
# Act
j2k.load()
jp2.load()
# Assert
assert j2k.mode == "RGBA"
assert jp2.mode == "RGBA"
def test_16bit_monochrome_has_correct_mode():
with Image.open("Tests/images/16bit.cropped.j2k") as j2k:
j2k.load()
assert j2k.mode == "I;16"
with Image.open("Tests/images/16bit.cropped.jp2") as jp2:
jp2.load()
assert jp2.mode == "I;16"
def test_16bit_monochrome_jp2_like_tiff():
with Image.open("Tests/images/16bit.cropped.tif") as tiff_16bit:
assert_image_similar_tofile(tiff_16bit, "Tests/images/16bit.cropped.jp2", 1e-3)
def test_16bit_monochrome_j2k_like_tiff():
with Image.open("Tests/images/16bit.cropped.tif") as tiff_16bit:
assert_image_similar_tofile(tiff_16bit, "Tests/images/16bit.cropped.j2k", 1e-3)
def test_16bit_j2k_roundtrips():
with Image.open("Tests/images/16bit.cropped.j2k") as j2k:
im = roundtrip(j2k)
assert_image_equal(im, j2k)
def test_16bit_jp2_roundtrips():
with Image.open("Tests/images/16bit.cropped.jp2") as jp2:
im = roundtrip(jp2)
assert_image_equal(im, jp2)
def test_unbound_local():
# prepatch, a malformed jp2 file could cause an UnboundLocalError exception.
with pytest.raises(OSError):
with Image.open("Tests/images/unbound_variable.jp2"):
pass
def test_parser_feed():
# Arrange
with open("Tests/images/test-card-lossless.jp2", "rb") as f:
data = f.read()
# Act
p = ImageFile.Parser()
p.feed(data)
# Assert
assert p.image.size == (640, 480)
@pytest.mark.skipif(
not os.path.exists(EXTRA_DIR), reason="Extra image files not installed"
)
@pytest.mark.parametrize("name", ("subsampling_1", "subsampling_2", "zoo1", "zoo2"))
def test_subsampling_decode(name):
test = f"{EXTRA_DIR}/{name}.jp2"
reference = f"{EXTRA_DIR}/{name}.ppm"
with Image.open(test) as im:
epsilon = 3 # for YCbCr images
with Image.open(reference) as im2:
width, height = im2.size
if name[-1] == "2":
# RGB reference images are downscaled
epsilon = 3e-3
width, height = width * 2, height * 2
expected = im2.resize((width, height), Image.Resampling.NEAREST)
assert_image_similar(im, expected, epsilon)
@pytest.mark.parametrize(
"test_file",
[
"Tests/images/crash-4fb027452e6988530aa5dabee76eecacb3b79f8a.j2k",
"Tests/images/crash-7d4c83eb92150fb8f1653a697703ae06ae7c4998.j2k",
"Tests/images/crash-ccca68ff40171fdae983d924e127a721cab2bd50.j2k",
"Tests/images/crash-d2c93af851d3ab9a19e34503626368b2ecde9c03.j2k",
],
)
def test_crashes(test_file):
with open(test_file, "rb") as f:
with Image.open(f) as im:
# Valgrind should not complain here
try:
im.load()
except OSError:
pass